CN102717844A - Hydraulic track tensioning device, track tensioning method and track type engineering machinery - Google Patents
Hydraulic track tensioning device, track tensioning method and track type engineering machinery Download PDFInfo
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Abstract
The invention discloses a hydraulic track tensioning device, which comprises a tensioning oil cylinder (1), wherein the hydraulic track tensioning device also comprises a switching valve (9), the switching valve (9) can be switched to enable the hydraulic track tensioning device to be in a first tensioning state or a second tensioning state, and in the first tensioning state, the pressure of a rodless cavity and the pressure of a rod cavity of the tensioning oil cylinder (1) are equal, so that a piston rod of the tensioning oil cylinder (1) generates a first tensioning force (F1); in a second tensioning state, the pressure of the rod chamber of the tensioning cylinder (1) is lower than the pressure of the rodless chamber, so that the piston rod of the tensioning cylinder (1) generates a second tensioning force (F2), which second tensioning force (F2) is greater than the first tensioning force (F1). The invention also discloses a track tensioning method and a track type engineering machine. The hydraulic track tensioning device provides tensioning forces with different sizes in a first tensioning state or a second tensioning state so as to meet the use requirements under different working conditions.
Description
Technical field
The present invention relates to engineering machinery field, particularly, relate to a kind of hydraulic track tensioner device, crawler tensioning method and tracked construction equipment.
Background technology
In construction machinery and equipment; In order to overcome abominable open work environment and changeable road conditions; The ground-surface effect of unmade way and rubble place etc. particularly; Construction machinery and equipment adopts the crawler-mounted traveling gear usually, for example crawler crane, traxcavator and crawler doer etc., and the crawler-mounted traveling gear is provided with the hydraulic track tensioner device of fluid pressure type usually.The hydraulic track tensioner device is the important component part of crawler-mounted traveling gear, and requirement can adapt to the road conditions complicated and changeable and the motoring condition of construction machinery and equipment, and its performance quality has very big influence to the rideability of crawler-mounted construction machinery and equipment.
At present, the hydraulic track tensioner device has various ways, and Chinese invention patent application CN1119846A discloses a kind of hydraulic track tensioner equipment of tensioned tracks formula traveling gear crawler belt; This equipment mainly is made up of two tensioning hydro-cylinders and a plurality of valve, and wherein, these two tensioning hydro-cylinders connect mutually through pipeline; And be connected with valve through other pipeline; Tensioning hydro-cylinder is fixed on the frame of crawler type walking mechanism, and the guide wheel of crawler type walking mechanism is bearing on the piston rod of tensioning hydro-cylinder; It is characterized by: be parallel to tensioning hydro-cylinder and connect a soft spring (being energy storage); So when crawler tensioning equipment began to load, in tensioning hydro-cylinder, only producing less pressure increased.
Because the construction machinery and equipment tensile force that crawler belt needs when advancing perhaps Parking operation and reversing varies in size; The tensile force that crawler belt needs when promptly advancing perhaps Parking operation is less relatively; The tensile force that crawler belt needs during reversing is relatively large; It is constant that but the tensile force that this hydraulic track tensioner device provides crawler belt remains under the different working state, can cause following two kinds of situation:
1, the tensile force of crawler belt is set to less and satisfied relatively advance or during the demand of Parking operation when the hydraulic track tensioner device; Owing to causing track adjusting wheel, the less meeting of tensile force receives the piston rod withdrawal that big pressure promotes tensioning hydro-cylinder during reversing; Cause the oil pressure in the hydraulic track tensioner device excessive easily, even surpass the safe pressure of hydraulic track tensioner device and cause the construction machinery and equipment off-load to shut down;
2, when the hydraulic track tensioner device is set to the demand of relatively large and satisfied reversing to the tensile force of crawler belt; The hydraulic track tensioner device applies bigger tensile force all the time to crawler belt, and crawler belt is tight, works long hours and causes the crawler belt wearing and tearing easily; Even fracture, reduce service life.
Therefore, need a kind of hydraulic track tensioner device that the tensile force that is adapted to different motoring conditions can be provided.
Summary of the invention
The purpose of this invention is to provide a kind of hydraulic track tensioner device, crawler tensioning method and tracked construction equipment; This hydraulic track tensioner device can be under first tensioning state or under second tensioning state tensile force that varies in size being provided, to satisfy the user demand under the different operating modes.
To achieve these goals; One side of the present invention provides a kind of hydraulic track tensioner device; This hydraulic track tensioner device comprises tensioning hydro-cylinder, and wherein, this hydraulic track tensioner device also comprises transfer valve; This transfer valve can switch so that said hydraulic track tensioner device is in first tensioning state or second tensioning state; Under said first tensioning state, the pressure of the rodless cavity of said tensioning hydro-cylinder and the pressure of rod chamber equate, make the piston rod of said tensioning hydro-cylinder produce first tensile force; Under said second tensioning state, the pressure of the rod chamber of said tensioning hydro-cylinder makes the piston rod of said tensioning hydro-cylinder produce second tensile force less than the pressure of rodless cavity, and this second tensile force is greater than said first tensile force.
Preferably; Said transfer valve comprises first switch valve and second switch valve; The rodless cavity of said tensioning hydro-cylinder and first pipeline connection; Other being connected on said first pipeline and with the rod chamber of said tensioning hydro-cylinder of said first switch valve is connected, and the rod chamber of said tensioning hydro-cylinder is connected with second pipeline through said second switch valve, and the pressure of this second pipeline is less than the pressure of said first pipeline; Under said first tensioning state, said first switch valve is in open mode and said second switch valve is in closed condition; Under said second tensioning state, said first switch valve is in closed condition and said second switch valve is in open mode.
Preferably; Said transfer valve is a change-over valve; The rodless cavity of said tensioning hydro-cylinder and first pipeline connection, the rod chamber of said tensioning hydro-cylinder through said change-over valve optionally with said first pipeline or second pipeline connection, the pressure of this second pipeline is less than the pressure of said first pipeline.
Preferably, said hydraulic track tensioner device also comprises master cock, and this master cock is electrically connected with said transfer valve, can control said transfer valve and switch.
Preferably; Said hydraulic track tensioner device also comprises main valve; The oil inlet of this main valve and return opening are communicated with oil inlet and oil return pipe respectively, first hydraulic fluid port of said main valve and said first pipeline connection, second hydraulic fluid port of said main valve and said second pipeline connection.
Preferably, be connected with back pressure valve on said second pipeline, the back pressure of this back pressure valve is less than the pressure of said first pipeline.
Preferably, said hydraulic track tensioner device also comprises energy storage, and this energy storage is other to be connected on said first pipeline.
Preferably; Said hydraulic track tensioner device also comprises pressure sensor and controller; Other being connected on said first pipeline and with said controller of said pressure sensor is electrically connected; To give said controller with the pressure signal transmission of detected said first pipeline of said pressure sensor, said controller is electrically connected with said main valve, thereby transmits control signal to said main valve according to the pressure signal of said pressure sensor.
Preferably, said hydraulic track tensioner device also comprises check valve, and this check valve is connected on said first pipeline, flows to the rodless cavity and the said transfer valve of said tensioning hydro-cylinder from first hydraulic fluid port of said main valve to allow fluid.
Preferably, said check valve is a hydraulic control one-way valve, the control mouth of this hydraulic control one-way valve and said second pipeline connection.
Preferably, said hydraulic track tensioner device also comprises by pass valve, and this by pass valve is connected on said first pipeline and between second hydraulic fluid port of said check valve and said main valve.
Another aspect of the present invention provides a kind of crawler tensioning method; This crawler tensioning method comprises uses tensioning hydro-cylinder that crawler belt is carried out tensioning; Wherein, Under first tensioning state, the pressure of the rodless cavity of said tensioning hydro-cylinder and the pressure of rod chamber equate, make the piston rod of said tensioning hydro-cylinder produce first tensile force to crawler belt; Under second tensioning state, the pressure of the rod chamber of said tensioning hydro-cylinder makes the piston rod of said tensioning hydro-cylinder produce second tensile force to crawler belt less than the pressure of rodless cavity, and this second tensile force is greater than said first tensile force.
Preferably, the rodless cavity of said tensioning hydro-cylinder and first pipeline connection, use transfer valve make said tensioning hydro-cylinder rod chamber optionally with said first pipeline or second pipeline connection, the pressure of this second pipeline is less than the pressure of said first pipeline.
One side more of the present invention provides a kind of tracked construction equipment, and this tracked construction equipment comprises the hydraulic track tensioner device, and wherein, said hydraulic track tensioner device is a hydraulic track tensioner device recited above.
Pass through technique scheme; When the construction machinery and equipment that adopts crawler type walking mechanism advances perhaps Parking operation; The hydraulic track tensioner device is in first tensioning state; The pressure of the rodless cavity of tensioning hydro-cylinder and the pressure of rod chamber equate, thereby the piston rod of tensioning hydro-cylinder applies the first less tensile force to crawler belt; When construction machinery and equipment is moveed backward; The operation transfer valve switches; The hydraulic track tensioner device is in second tensioning state; The pressure of the rod chamber of tensioning hydro-cylinder utilizes the difference of pressure and the difference in areas of rod chamber and rodless cavity less than the pressure of rodless cavity, thereby the piston rod of tensioning hydro-cylinder applies the second bigger tensile force to crawler belt.Operate transfer valve once more and switch, make the hydraulic track tensioner device switch to first tensioning state from second tensioning state.
Therefore; When construction machinery and equipment is in different motoring condition (advancing or Parking and reversing); The hydraulic track tensioner device can provide the tensile force that adapts for crawler belt; Make crawler belt under different motoring conditions, can keep tensioning state preferably all the time, avoid advancing or during Parking tensile force excessive and cause crawler belt impaired, tensile force is too small and cause the oil pressure in the hydraulic track tensioner device excessive when preventing to move backward.
Other features and advantages of the present invention will partly specify in the specific embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide further understanding of the present invention, and constitutes the part of specification sheets, is used to explain the present invention with the following specific embodiment, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the hydraulic schematic diagram of the hydraulic track tensioner device of first embodiment of the present invention;
Fig. 2 is the hydraulic schematic diagram of the hydraulic track tensioner device of second embodiment of the present invention;
Fig. 3 is the hydraulic schematic diagram of the hydraulic track tensioner device of the 3rd embodiment of the present invention;
Fig. 4 is the pressure state figure of tensioning hydro-cylinder under first tensioning state of hydraulic track tensioner device of the present invention; And
Fig. 5 is the pressure state figure of tensioning hydro-cylinder under second tensioning state of hydraulic track tensioner device of the present invention.
Description of reference numerals
1 tensioning hydro-cylinder, 2 first switch valves
3 second switch valves, 4 main valves
5 energy storages, 6 pressure sensors
7 check valves, 8 by pass valves
9 transfer valves, 10 back pressure valves
11 first pipelines, 12 second pipelines
P oil inlet T oil return pipe
The F1 first tensile force F2 second tensile force
The diameter of diameter d 1 piston rod of d0 tensioning hydro-cylinder
The specific embodiment
Be elaborated below in conjunction with the accompanying drawing specific embodiments of the invention.Should be understood that the specific embodiment described herein only is used for explanation and explains the present invention, is not limited to the present invention.
Like Fig. 1-shown in Figure 3 is the hydraulic schematic diagram of the hydraulic track tensioner device of three kinds of embodiments of the present invention; One side of the present invention provides a kind of hydraulic track tensioner device; This hydraulic track tensioner device comprises tensioning hydro-cylinder 1, and wherein, this hydraulic track tensioner device also comprises transfer valve 9; This transfer valve 9 can switch so that said hydraulic track tensioner device is in first tensioning state or second tensioning state; Under said first tensioning state, the pressure of the rodless cavity of said tensioning hydro-cylinder 1 and the pressure of rod chamber equate, make the piston rod of said tensioning hydro-cylinder 1 produce the first tensile force F1; Under said second tensioning state, the pressure of the rod chamber of said tensioning hydro-cylinder 1 makes the piston rod of said tensioning hydro-cylinder 1 produce the second tensile force F2 less than the pressure of rodless cavity, and this second tensile force F2 is greater than the said first tensile force F1.
When the construction machinery and equipment that adopts crawler type walking mechanism advanced perhaps Parking operation, the hydraulic track tensioner device was in first tensioning state, and then the pressure of the pressure of the rodless cavity of tensioning hydro-cylinder 1 and rod chamber equates; As shown in Figure 4; Thereby the piston rod of tensioning hydro-cylinder 1 applies the first less tensile force F1 to crawler belt, is P1 if set the pressure of rodless cavity and rod chamber, and the diameter of tensioning hydro-cylinder is d0; The diameter of piston rod is d1, and rodless cavity to the upward pressure that piston rod produces is:
Rod chamber to the downward pressure that piston rod produces is:
Therefore the first tensile force F1 does
When construction machinery and equipment was moveed backward, operation transfer valve 9 switched, and the hydraulic track tensioner device is in second tensioning state; The pressure of the rod chamber of tensioning hydro-cylinder 1 is less than the pressure of rodless cavity, and is as shown in Figure 5, utilizes the difference of pressure and the difference in areas of rod chamber and rodless cavity; Thereby the piston rod of tensioning hydro-cylinder 1 applies the second bigger tensile force F2 to crawler belt, and the pressure of rodless cavity remains unchanged and is P1, and the pressure of setting rod chamber is P2; P2＜P1, rodless cavity to the upward pressure that piston rod produces is:
Rod chamber to the downward pressure that piston rod produces is:
The second tensile force F2 does
Operate transfer valve 9 once more and switch, make the hydraulic track tensioner device switch to first tensioning state from second tensioning state.
Therefore; When construction machinery and equipment is in different motoring condition (advancing or Parking and reversing); The hydraulic track tensioner device can provide the tensile force that adapts for crawler belt; Make crawler belt under different motoring conditions, can keep tensioning state preferably all the time, avoid advancing or during Parking tensile force excessive and cause crawler belt impaired, tensile force is too small and cause the oil pressure in the hydraulic track tensioner device excessive when preventing to move backward.
Be illustrated in figure 1 as the hydraulic schematic diagram of first embodiment of the present invention; Preferably; Said transfer valve 9 comprises first switch valve 2 and second switch valve 3, and the rodless cavity of said tensioning hydro-cylinder 1 is communicated with first pipeline 11, and said first switch valve, 2 other being connected on said first pipeline 11 and with the rod chamber of said tensioning hydro-cylinder 1 are connected; The rod chamber of said tensioning hydro-cylinder 1 is connected with second pipeline 12 through said second switch valve 3, and the pressure of this second pipeline 12 is less than the pressure of said first pipeline 11.
Under first tensioning state, first switch valve 2 is in open mode, and second switch valve 3 is in closed condition, and the rodless cavity of tensioning hydro-cylinder 1 is communicated with rod chamber, thereby the pressure in rodless cavity and the rod chamber equates and be equal to the pressure of first pipeline 11; Under second tensioning state; First switch valve 2 is in closed condition; Second switch valve 3 is in open mode, and the rodless cavity of tensioning hydro-cylinder 1 is not communicated with rod chamber and rod chamber is communicated with second pipeline 12, thereby the pressure in the rod chamber is less than the pressure in the rodless cavity.Therefore, through the pressure in the rod chamber that changes tensioning hydro-cylinder 1, to realize adaptive change to the tensile force of crawler belt.
Wherein, first switch valve 2 can adopt shutoff valve, change-over valve etc. with second switch valve 3, adopts the bi-bit bi-pass solenoid directional control valve in this first embodiment, makes things convenient for the automatic guidance of transfer valve 9 change actions, makes simple to operate.
Be illustrated in figure 2 as the hydraulic schematic diagram of second embodiment of the present invention; Preferably; Said transfer valve 9 is a change-over valve; The rodless cavity of said tensioning hydro-cylinder 1 is communicated with first pipeline 11, and the rod chamber of said tensioning hydro-cylinder 1 optionally is communicated with said first pipeline 11 or second pipeline 12 through said change-over valve 9, and the pressure of this second pipeline 12 is less than the pressure of said first pipeline 11.
Change-over valve can adopt various forms of change-over valves, in second embodiment, adopts the two-position three way solenoid directional control valve to describe as an example, makes convenient operation and control, and pipeline connects simple.
Under first tensioning state, change-over valve is in left side position, and the rodless cavity of tensioning hydro-cylinder 1 is communicated with rod chamber, thereby rodless cavity and the interior pressure of rod chamber equate and be equal to the pressure of first pipeline 11; Under second tensioning state, change-over valve is in right position, and the rodless cavity of tensioning hydro-cylinder 1 is not communicated with rod chamber and rod chamber is communicated with second pipeline 12, thereby the pressure in the rod chamber is less than the pressure in the rodless cavity.Therefore, through the pressure in the rod chamber that changes tensioning hydro-cylinder 1, to realize adaptive change to the tensile force of crawler belt.Adopt transfer valve 9 operation and the control more easily of two-position three way solenoid directional control valve, realize the switching of tensioning state.
Control the blocked operation of transfer valve 9 for ease, preferably, said hydraulic track tensioner device also comprises master cock, and this master cock is electrically connected with said transfer valve 9, can control said transfer valve 9 and switch.In first embodiment and second embodiment; Transfer valve 9 can adopt two bi-bit bi-pass solenoid directional control valves or a two-position three way solenoid directional control valve to realize; Through master cock the action of transfer valve 9 is controlled then, made that the control of change action is convenient.Certainly, also can control the action of transfer valve 9, this no longer tired stating through controller.
As depicted in figs. 1 and 2; For ease whole hydraulic track tensioner device is controlled; Preferably, said hydraulic track tensioner device also comprises main valve 4, and the oil inlet of this main valve 4 and return opening are communicated with oil inlet P and oil return pipe T respectively; First hydraulic fluid port of said main valve 4 is communicated with said first pipeline 11, and second hydraulic fluid port of said main valve 4 is communicated with said second pipeline 12.
Under second tensioning state; Main valve 4 commutates to right position from meta; Oil inlet P is communicated with through main valve 4 with first pipeline 11; And second pipeline 12 is communicated with through main valve 4 with oil return pipe T, and 11 oil-feeds of first pipeline make the pressure of rodless cavity of tensioning hydro-cylinder 1 reach P1, and the pressure of the rod chamber of tensioning hydro-cylinder 1 is reduced to P2.In first embodiment and second embodiment; As depicted in figs. 1 and 2; P2 is 0, and then the second tensile force F2 is
in the 3rd embodiment, and is as shown in Figure 3; Owing to be connected with back pressure valve 10 on said second pipeline 12; The back pressure of this back pressure valve 10 is less than the pressure of said first pipeline 11, and then P2 is the back pressure of back pressure valve 10, and this back pressure is greater than 0 arbitrary value less than P1.Main valve 4 commutates to meta then, makes the pressure of rodless cavity remain P1, and the pressure of rod chamber remains P2, thereby the tensile force that the piston rod of tensioning hydro-cylinder 1 applies crawler belt remains the second tensile force F2.Wherein, back pressure valve 10 can adopt by pass valve, check valve, shutoff valve etc., adopt by pass valve as back pressure valve in the 3rd embodiment, and the back pressure of back pressure valve can be set to adjustable.
When if crawler belt need be safeguarded, main valve 4 commutates to position, a left side, and transfer valve 9 is in first tensioning state, thereby can carry out oil return through 11 pairs of tensioning hydro-cylinders of first pipeline 1, with the tensile force of removal hydraulic track tensioner device to crawler belt.
Like Fig. 1-shown in Figure 3, in order to keep the pressure of tensioning hydro-cylinder 1, preferably, said hydraulic track tensioner device also comprises energy storage 5, these energy storage 5 other being connected on said first pipeline 11.Under each tensioning state, the pressure of the rodless cavity of tensioning hydro-cylinder 1 is kept by energy storage 5, make that the pressure of hydraulic track tensioner device is more stable, thereby the tensile force that applies can keep stably.In the process of construction machinery and equipment work, crawler belt receives the external force effect and causes the hydraulic track tensioner device to receive when impacting, and energy storage 5 can cushion foreign impacts and absorbed oscillation, makes that the operation of construction machinery and equipment is more stable.
Like Fig. 1-shown in Figure 3; In order to control main valve 4 more easily; Make the pressure P 1 of rodless cavity of tensioning hydro-cylinder 1 can reach the pressure P of setting, preferably, said hydraulic track tensioner device also comprises pressure sensor 6 and controller; Said pressure sensor 6 other being connected on said first pipeline 11 and with said controller are electrically connected; To give said controller with the pressure signal transmission of said pressure sensor 6 detected said first pipelines 11, said controller is electrically connected with said main valve 4, thereby transmits control signal to said main valve 4 according to the pressure signal of said pressure sensor 6.
Like Fig. 1-shown in Figure 3; For the fluid that prevents first pipeline 11 flows backwards; Preferably; Said hydraulic track tensioner device also comprises check valve 7, and this check valve 7 is connected on said first pipeline 11, flows to the rodless cavity and the said transfer valve 9 of said tensioning hydro-cylinder 1 from first hydraulic fluid port of said main valve 4 to allow fluid.This check valve 7 only allows the fluid nonreturn flow in first pipeline 11, prevents energy storage 5 and fluid in the tensioning hydro-cylinder 1 main valve 4 that flows backwards back, causes main valve 4 impaired, even causes fluid to flow back among the oil inlet P and make the Hydraulic Pump damage.
The off-load of hydraulic track tensioner device maintenance the time carrying out for ease, like Fig. 1-shown in Figure 3, preferably, said check valve 7 is a hydraulic control one-way valve, the control mouth of this hydraulic control one-way valve is communicated with said second pipeline 12.Main valve 4 is in position, a left side during maintenance; Second pipeline 12 is communicated with through main valve 4 with oil inlet P; Produce certain pressure in second pipeline 12 and controlling non-return valve 7 is opened; And then energy storage 5 can flow back among the oil return pipe T through main valve 1 with fluid in the tensioning hydro-cylinder 1, so that the hydraulic track tensioner device is carried out off-load.
Like Fig. 1-shown in Figure 3; In order to guarantee the safe operation of hydraulic track tensioner device; Preferably, said hydraulic track tensioner device also comprises by pass valve 8, and this by pass valve 8 is connected on said first pipeline 11 and between second hydraulic fluid port of said check valve 7 and said main valve 4.When the hydraulic track tensioner device received bigger foreign impacts, by pass valve 8 was opened and is carried out overflow, thereby off-load is protected to the hydraulic track tensioner device.After foreign impacts was eliminated, main valve 4 was positioned at right position, and whole hydraulic track tensioner device is carried out automatic repairing.
Another aspect of the present invention provides a kind of crawler tensioning method; This crawler tensioning method comprises uses 1 pair of crawler belt of tensioning hydro-cylinder to carry out tensioning; Wherein, Under first tensioning state, the pressure of the rodless cavity of said tensioning hydro-cylinder 1 and the pressure of rod chamber equate, make the piston rod of said tensioning hydro-cylinder 1 produce the first tensile force F1 to crawler belt; Under second tensioning state, the pressure of the rod chamber of said tensioning hydro-cylinder 1 makes the piston rod of said tensioning hydro-cylinder 1 produce the second tensile force F2 to crawler belt less than the pressure of rodless cavity, and this second tensile force F2 is greater than the said first tensile force F1.
Can adopt variety of way to make the pressure of pressure and rod chamber of rodless cavity of tensioning hydro-cylinder 1 equate or unequal (being the pressure of the pressure of rodless cavity) greater than rod chamber; Thereby be in first tensioning state or second tensioning state; Crawler belt is applied the first tensile force F1 or the second tensile force F2; And the second tensile force F2 to adapt to the different tensioning state of crawler belt needs, satisfies user demand greater than the first tensile force F1.
As a kind of embodiment; Preferably; The rodless cavity of said tensioning hydro-cylinder 1 is communicated with first pipeline 11; Use transfer valve 9 to make the rod chamber of said tensioning hydro-cylinder 1 optionally be communicated with said first pipeline 11 or second pipeline 12, the pressure of this second pipeline 12 is less than the pressure of said first pipeline 11.Adopt transfer valve 9 to make the rod chamber of tensioning hydro-cylinder 1 be communicated with, realize the switching between the first tensile force F1 and the second tensile force F2, to adapt to different crawler tensioning demands with first pipeline 11 or second pipeline 12.
One side more of the present invention provides a kind of tracked construction equipment, and this tracked construction equipment comprises the hydraulic track tensioner device, and wherein, said hydraulic track tensioner device is a hydraulic track tensioner device recited above.Because the hydraulic track tensioner device can provide the tensile force that varies in size under first tensioning state or under second tensioning state; To satisfy the user demand of tracked construction equipment under different operating modes; Make the crawler belt of tracked construction equipment be in all the time under the suitable tensioning state, to guarantee good operation and motoring condition.
More than combine accompanying drawing to describe preferred implementation of the present invention in detail; But; The present invention is not limited to the detail in the above-mentioned embodiment; In technical conceive scope of the present invention, can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Need to prove in addition; Each concrete technical characterictic described in the above-mentioned specific embodiment under reconcilable situation, can make up through any suitable manner; For fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible array modes.
In addition, also can carry out combination in any between the various embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be regarded as the disclosed content of the present invention equally.
Claims (14)
1. hydraulic track tensioner device; This hydraulic track tensioner device comprises tensioning hydro-cylinder (1); It is characterized in that; This hydraulic track tensioner device also comprises transfer valve (9), and this transfer valve (9) can switch so that said hydraulic track tensioner device is in first tensioning state or second tensioning state, under said first tensioning state; The pressure of the rodless cavity of said tensioning hydro-cylinder (1) and the pressure of rod chamber equate, make the piston rod of said tensioning hydro-cylinder (1) produce first tensile force (F1); Under said second tensioning state; The pressure of the rod chamber of said tensioning hydro-cylinder (1) is less than the pressure of rodless cavity; Make the piston rod of said tensioning hydro-cylinder (1) produce second tensile force (F2), this second tensile force (F2) is greater than said first tensile force (F1).
2. hydraulic track tensioner device according to claim 1; It is characterized in that; Said transfer valve (9) comprises first switch valve (2) and second switch valve (3); The rodless cavity of said tensioning hydro-cylinder (1) is communicated with first pipeline (11); Other said first pipeline (11) that is connected on of said first switch valve (2) upward and with the rod chamber of said tensioning hydro-cylinder (1) is connected, and the rod chamber of said tensioning hydro-cylinder (1) is connected with second pipeline (12) through said second switch valve (3), and the pressure of this second pipeline (12) is less than the pressure of said first pipeline (11); Under said first tensioning state, said first switch valve (2) is in open mode and said second switch valve (3) is in closed condition; Under said second tensioning state, said first switch valve (2) is in closed condition and said second switch valve (3) is in open mode.
3. hydraulic track tensioner device according to claim 1; It is characterized in that; Said transfer valve (9) is a change-over valve; The rodless cavity of said tensioning hydro-cylinder (1) is communicated with first pipeline (11), and the rod chamber of said tensioning hydro-cylinder (1) optionally is communicated with said first pipeline (11) or second pipeline (12) through said change-over valve (9), and the pressure of this second pipeline (12) is less than the pressure of said first pipeline (11).
4. according to any described hydraulic track tensioner device among the claim 1-3; It is characterized in that; This hydraulic track tensioner device also comprises master cock, and this master cock is electrically connected with said transfer valve (9), can control said transfer valve (9) and switch.
5. according to claim 2 or 3 described hydraulic track tensioner devices; It is characterized in that; This hydraulic track tensioner device also comprises main valve (4); Oil inlet of this main valve (4) and return opening are communicated with oil inlet (P) and oil return pipe (T) respectively, and first hydraulic fluid port of said main valve (4) is communicated with said first pipeline (11), and second hydraulic fluid port of said main valve (4) is communicated with said second pipeline (12).
6. hydraulic track tensioner device according to claim 5 is characterized in that, is connected with back pressure valve (10) on said second pipeline (12), and the back pressure of this back pressure valve (10) is less than the pressure of said first pipeline (11).
7. hydraulic track tensioner device according to claim 5 is characterized in that, this hydraulic track tensioner device also comprises energy storage (5), and this energy storage (5) is other to be connected on said first pipeline (11).
8. hydraulic track tensioner device according to claim 7; It is characterized in that; This hydraulic track tensioner device also comprises pressure sensor (6) and controller; Other said first pipeline (11) that is connected on of said pressure sensor (6) is gone up and is electrically connected with said controller; To give said controller with the pressure signal transmission of detected said first pipeline of said pressure sensor (6) (11), said controller is electrically connected with said main valve (4), thereby transmits control signal to said main valve (4) according to the pressure signal of said pressure sensor (6).
9. hydraulic track tensioner device according to claim 5; It is characterized in that; This hydraulic track tensioner device also comprises check valve (7); This check valve (7) is connected on said first pipeline (11), flows to the rodless cavity and the said transfer valve (9) of said tensioning hydro-cylinder (1) from first hydraulic fluid port of said main valve (4) to allow fluid.
10. hydraulic track tensioner device according to claim 9 is characterized in that, said check valve (7) is a hydraulic control one-way valve, and the control mouth of this hydraulic control one-way valve is communicated with said second pipeline (12).
11. hydraulic track tensioner device according to claim 9; It is characterized in that; This hydraulic track tensioner device also comprises by pass valve (8), and this by pass valve (8) is connected on said first pipeline (11) and is positioned between second hydraulic fluid port of said check valve (7) and said main valve (4).
12. crawler tensioning method; This crawler tensioning method comprises uses tensioning hydro-cylinder (1) that crawler belt is carried out tensioning; It is characterized in that; Under first tensioning state, the pressure of the rodless cavity of said tensioning hydro-cylinder (1) and the pressure of rod chamber equate, make the piston rod of said tensioning hydro-cylinder (1) produce first tensile force (F1) to crawler belt; Under second tensioning state; The pressure of the rod chamber of said tensioning hydro-cylinder (1) is less than the pressure of rodless cavity; Make the piston rod of said tensioning hydro-cylinder (1) produce second tensile force (F2) to crawler belt, this second tensile force (F2) is greater than said first tensile force (F1).
13. crawler tensioning method according to claim 12; It is characterized in that; The rodless cavity of said tensioning hydro-cylinder (1) is communicated with first pipeline (11); Use transfer valve (9) to make the rod chamber of said tensioning hydro-cylinder (1) optionally be communicated with said first pipeline (11) or second pipeline (12), the pressure of this second pipeline (12) is less than the pressure of said first pipeline (11).
14. a tracked construction equipment, this tracked construction equipment comprises the hydraulic track tensioner device, it is characterized in that, said hydraulic track tensioner device is according to any described hydraulic track tensioner device among the claim 1-11.
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| CN2012102315384A CN102717844A (en) | 2012-07-05 | 2012-07-05 | Hydraulic track tensioning device, track tensioning method and track type engineering machinery |
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| CN2012102315384A CN102717844A (en) | 2012-07-05 | 2012-07-05 | Hydraulic track tensioning device, track tensioning method and track type engineering machinery |
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| CN102717844A true CN102717844A (en) | 2012-10-10 |
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| CN2012102315384A Pending CN102717844A (en) | 2012-07-05 | 2012-07-05 | Hydraulic track tensioning device, track tensioning method and track type engineering machinery |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103062141A (en) * | 2012-12-21 | 2013-04-24 | 三一重型装备有限公司 | Track traveling mechanism, hydraulic system thereof and engineering machinery |
| CN103423221A (en) * | 2013-07-24 | 2013-12-04 | 三一汽车起重机械有限公司 | Multi-oil-cylinder sequence telescopic hydraulic system and engineering machine |
| CN103625570A (en) * | 2013-12-09 | 2014-03-12 | 中联重科股份有限公司 | Hydraulic control system of crawler tensioning device |
| CN105544643A (en) * | 2015-12-31 | 2016-05-04 | 湖南瑞龙重工科技有限公司 | Pressure stabilization control system of pitching oil cylinders of active carry-scraper |
| CN109099016A (en) * | 2018-09-14 | 2018-12-28 | 徐州徐工基础工程机械有限公司 | Active Compensation formula flexibility follows hydraulic system, working method and tunnel descaling machine |
| CN111516769A (en) * | 2020-05-12 | 2020-08-11 | 三一重机有限公司 | Crawler tensioning device and crawler type engineering machinery |
| CN111532351A (en) * | 2020-05-12 | 2020-08-14 | 三一重机有限公司 | Adaptive tensioning control system and tensioning method |
| CN113738709A (en) * | 2021-08-25 | 2021-12-03 | 湖南三一中益机械有限公司 | Tensioning hydraulic system, traveling machine, and crawler tensioning method for traveling machine |
| CN114148688A (en) * | 2021-11-11 | 2022-03-08 | 中建材创新科技研究院有限公司 | Drying machine and chain tensioning device thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5316381A (en) * | 1992-11-13 | 1994-05-31 | Deere & Company | Tensioning and suspension system for a tracked vehicle |
| CN1119846A (en) * | 1993-03-26 | 1996-04-03 | 克虏伯工业技术有限公司 | Hydraulic track tensioner for tensioning tracks of tracked gears |
| DE19919959A1 (en) * | 1999-04-30 | 2000-11-02 | Caterpillar Inc | Crawler running gear for self-propelled harvester vehicles has anchor plate with lateral guide and bearing journal for crawler gear connecting flange holder on machine frame, front axle |
| CN102390448A (en) * | 2011-07-27 | 2012-03-28 | 中联重科股份有限公司 | Tensioning device and crawler-type traveling machine with same |
-
2012
- 2012-07-05 CN CN2012102315384A patent/CN102717844A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5316381A (en) * | 1992-11-13 | 1994-05-31 | Deere & Company | Tensioning and suspension system for a tracked vehicle |
| CN1119846A (en) * | 1993-03-26 | 1996-04-03 | 克虏伯工业技术有限公司 | Hydraulic track tensioner for tensioning tracks of tracked gears |
| DE19919959A1 (en) * | 1999-04-30 | 2000-11-02 | Caterpillar Inc | Crawler running gear for self-propelled harvester vehicles has anchor plate with lateral guide and bearing journal for crawler gear connecting flange holder on machine frame, front axle |
| CN102390448A (en) * | 2011-07-27 | 2012-03-28 | 中联重科股份有限公司 | Tensioning device and crawler-type traveling machine with same |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103062141A (en) * | 2012-12-21 | 2013-04-24 | 三一重型装备有限公司 | Track traveling mechanism, hydraulic system thereof and engineering machinery |
| CN103423221A (en) * | 2013-07-24 | 2013-12-04 | 三一汽车起重机械有限公司 | Multi-oil-cylinder sequence telescopic hydraulic system and engineering machine |
| CN103423221B (en) * | 2013-07-24 | 2015-10-28 | 三一汽车起重机械有限公司 | Multi-oil-cylinder sequence telescopic hydraulic system and engineering machinery |
| CN103625570A (en) * | 2013-12-09 | 2014-03-12 | 中联重科股份有限公司 | Hydraulic control system of crawler tensioning device |
| CN103625570B (en) * | 2013-12-09 | 2016-03-02 | 中联重科股份有限公司 | Hydraulic control system of crawler tensioning device |
| CN105544643A (en) * | 2015-12-31 | 2016-05-04 | 湖南瑞龙重工科技有限公司 | Pressure stabilization control system of pitching oil cylinders of active carry-scraper |
| CN109099016A (en) * | 2018-09-14 | 2018-12-28 | 徐州徐工基础工程机械有限公司 | Active Compensation formula flexibility follows hydraulic system, working method and tunnel descaling machine |
| CN111516769A (en) * | 2020-05-12 | 2020-08-11 | 三一重机有限公司 | Crawler tensioning device and crawler type engineering machinery |
| CN111532351A (en) * | 2020-05-12 | 2020-08-14 | 三一重机有限公司 | Adaptive tensioning control system and tensioning method |
| CN111532351B (en) * | 2020-05-12 | 2021-04-13 | 三一重机有限公司 | Adaptive tensioning control system and tensioning method |
| CN111516769B (en) * | 2020-05-12 | 2023-11-17 | 三一重机有限公司 | Track tensioning device and track type engineering machinery |
| CN113738709A (en) * | 2021-08-25 | 2021-12-03 | 湖南三一中益机械有限公司 | Tensioning hydraulic system, traveling machine, and crawler tensioning method for traveling machine |
| CN113738709B (en) * | 2021-08-25 | 2024-01-23 | 湖南三一中益机械有限公司 | Tensioning hydraulic system, running machine and track tensioning method of running machine |
| CN114148688A (en) * | 2021-11-11 | 2022-03-08 | 中建材创新科技研究院有限公司 | Drying machine and chain tensioning device thereof |
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Application publication date: 20121010 |